| 引用本文: | 薛绍鹏,葛茂生,魏福强,等.旋转折射式喷头移动喷洒水量分布计算模型构建与应用[J].灌溉排水学报,0,():-. |
| Xue Shaopeng,Ge Maosheng,Wei Fuqiang,et al.旋转折射式喷头移动喷洒水量分布计算模型构建与应用[J].灌溉排水学报,0,():-. |
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| 摘要: |
| 【目的】探讨旋转折射式喷头移动喷洒水力特性，优化喷灌机机组运行参数和配置。【方法】采用喷灌强度等效拉伸法，构建了基于一次正交多项式拟合的移动喷洒水量分布计算模型，应用该模型对R3000、S3000、O3000喷头进行模拟计算，分析了工作压力（50~150 kPa）、移动速度（20~45 m/h）和组合间距（1.2~6 m）对3种喷头移动喷洒水量分布和均匀度的影响。【结果】（1）模型计算结果与实测值偏差在5%以内，模型精度较高。（2）R3000、S3000、O3000喷头移动降水深随距喷头距离的增加而减小，移动喷洒均匀度较固定喷洒分别提高11.17%、10.72%和2.36%。（3）随着工作压力的增大，R3000、S3000、O3000各喷头的有效喷灌半径逐渐增大，降水均匀度呈先增大后减小的趋势，最大降低幅度达35.66%。平均降水深和均匀度随移动速度的增大逐渐降低，但均匀度的平均变化幅度仅为0.59%、1.38%、0.99%，说明移动速度对均匀度的影响较小。随着组合间距的不断增大，均匀度呈波动下降的趋势。（4）考虑工作压力和组合间距双因素影响，R3000、S3000、O3000三喷头在低组合间距和高工作压力范围内取得较高的移动喷洒均匀度，在150 kPa-3.6 m、150 kPa-2.4 m、130 kPa-3.6 m配置组合条件下，喷洒均匀度最高。【结论】等效拉伸法降低了模型构建过程中的拟合次数，提高了计算精度；增大工作压力和降低组合间距有助于提高喷头移动喷洒均匀度。 |
| 关键词: 低压喷头；水量分布；均匀度；移动喷洒；数学模型；组合间距 |
| DOI： |
| 分类号:S275.5 |
| 基金项目:国家自然科学基金面上项目（52279045）；陕西省青年科技新星项目（2023KJXX-011） |
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| Modeling and application of rotary refractive sprinkler head mobile spray water distribution calculation model |
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Xue Shaopeng1,2, Ge Maosheng1,2, Wei Fuqiang1,2, Zhang Qianwen1,2, Zhang Tingning1,2
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1.Northwest A&2.F University
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| Abstract: |
| Abstract: 【Objective】Constructing a one-time fitted mobile spraying water distribution calculation model, exploring the hydraulic characteristics of mobile spraying with rotating refracting nozzles and optimising the unit's operating parameters and configuration. 【Method】This paper adopts the sprinkler intensity equivalent stretching method, and constructs a mobile sprinkler water distribution calculation model based on primary orthogonal polynomial fitting,. Apply the model to the R3000, S3000, O3000 rotary refractive sprinkler head simulation calculations, analysis of the working pressure (50~150 kPa), moving speed (20~45 m/h) and the combination of spacing (1.2 m~8.4 m) on the three types of sprinkler mobile sprinkler water distribution and uniformity,【Results】the results show that: (1) The mobile precipitation depth with the distance from the sprinkler head (1) The mobile precipitation depth of R3000, S3000 and O3000 sprinkler head decreases with the increase in distance from the nozzle, mobile spraying uniformity than fixed spraying increased by 11.17%, 10.72% and 2.36% respectively. (2) With the increase in working pressure, the effective spraying radius of R3000, S3000 and O3000 sprinkler heads gradually increased, and the uniformity of irrigation showed a trend of increasing and then decreasing. The average depth of precipitation and uniformity of each sprinkler head with the increase in moving speed gradually reduced, but the average change in uniformity is small, only 0.59%,1.38%and 0.99%. With the increasing of the combination distance, the average precipitation depth decreases and the decline rate gradually decreases, and the uniformity is fluctuating and decreasing trend. (3) Considering the influence of both working pressure and combination spacing, the highest uniformity of spraying was achieved under the conditions of R3000 at 150 kPa~3.6 m, S3000 at 150 kPa~2.4 m and O3000 at 130 kPa~3.6 m.【Conclusion】The equivalent stretching method reduces the number of fits in the model construction process and improves the calculation accuracy; increasing the working pressure and reducing the combination spacing helps to improve the uniformity of spraying by moving the nozzle. |
| Key words: Low pressure sprinkler; water quantity distribution; uniformity; mobile spraying; mathematical model; combination spacing |
